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ricin

[rahy-sin, ris-in]
noun Chemistry.
  1. a white, poisonous, protein powder from the bean of the castor-oil plant.
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Origin of ricin

1895–1900; < New Latin Ricinus name of genus, Latin: castor-oil plant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ricin

Contemporary Examples

Historical Examples

  • By George, though, that Paoli must be a clever one—think of his knowing about ricin.

    The Silent Bullet

    Arthur B. Reeve


British Dictionary definitions for ricin

ricin

noun
  1. biochem a highly toxic protein, a lectin, derived from castor-oil seeds: used in experimental cancer therapy
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Word Origin

C19: from New Latin Ricinus genus name, from Latin: castor-oil plant
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ricin

n.

poison obtained from the castor-oil bean, 1888, from ricinus, genus name of the castor-oil plant (1694), from Latin ricinus (Pliny), of uncertain origin, perhaps the same word as ricinus "tick" (in sheep, dogs, etc.).

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Online Etymology Dictionary, © 2010 Douglas Harper

ricin in Medicine

ricin

(rīsĭn, rĭsĭn)
n.
  1. A poisonous protein that is extracted from the castor bean and is used as a biochemical reagent.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ricin in Science

ricin

[rīsĭn, rĭsĭn]
  1. An extremely poisonous protein extracted from the castor bean. Ricin inhibits protein synthesis in cells, and is used as a biochemical reagent and in cancer research.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.